A new genus and species of Hydromedusae is described from the waters off North
Queensland. It is placed in the Dipleurosomatidae because of its irregularly branched radial
canals, gonads on the radial canals separated from the stomach, hollow marginal tentacles
and lack of cirri or cordyli. It differs from all other medusae in its two rows of small, simple,
wart-like gonadal papillae. It differs from the other dipleurosomatids in its unique
combination of other characters, namely, 5-6 radial canals leaving the stomach, branching
dichotomously an irregular number of times; about half as many tentacles as canal branches
reaching ring canal, not in correspondence with canal branches; with about 8 globular or
heart-shaped stalked clubs between successive tentacles; and lacking ocelli. This report
represents the first record of the Dipleurosomatidae in Australian waters.